Electrically operated and controlled oil burning mechanism



Nov. 15, 1932. w. w. WILLIAMS 8 ELECTRICALLY OPERATED AND CONTROLLEDOil; BURNING IECHANISI 3 Sheets-Sheet 1 I Origixgal Filed June 11. 1928INVENTOR Wfll. TER M WILL lflMS A'ITORNEY Nov,'15, 1932. w. w. WILLIAMSELECTRICALLY OPERATED AND CONTROLLED OIL BURNING MECHANISM OriginalFiled June 11. 1928 3 Sheets-Sheet ATTORNEY Nov. 15, 1932; w w, w s1,888,060

ELECTRICALLY OPERATED AND CONTROLLED OIL BURNING MECHANISM INVENTOR WALTEA m W/LL/fl/VS ATTORN EY Patented Nov. 15, 1932 UNITED STATESPATENTOFFICE WALTER W. 'W'ILLIAMS, OF BLOOMINGTON, ILLINOIS, ASSIGNOB TOWILLIAMS OIL-O- MATIC HEATING CORPORATION, OF BLOOMINGTON, ILLINOIS, ACORPORATION 01' ILLINOIS BLECTRICALLY OPERATED AND CONTROLLED OILBURNING MECHANISM Original application filed June 11, 1928, Serial No.284,545, now Patent No. 1,817,051, dated August 4.

1931. Divided and this application filed June 24, 1981. Serial No.546,537.

This invention relates to improvements in liquid fuel burners fordomestic heating pur poses and more particularly to an electricallyoperated and controlled oil burning mechanlsm, and is a division ofapplicants copending application, Serial No. 284,545, filed June 11,1928, which matured into Patent No.

, 1,817,051, August 4, 1931.

It is an object of this invention to provide a device of this characterwhich is of substantial yet simple construction and adapted to modernproduction methods with the various parts interchangeable and readilyadjustable.

With these and other objects in View refer- 5 ence is made to theaccompanying drawings which illustrate a preferred form of thisinvention with the-understanding that minor detail changes may be madewithout departing from the scope thereof.

In the drawings:

' Figure 1 is a view in side elevation of this improved device, asinstalled in connection with a commercial type of'domestic furnace, withparts broken away, and illustrating the electrical controls in diagram.

Figure 2 is an enlarged fragmentary detail view in front elevation, ofFigure 1, with parts broken away, and partly in section.

Figure 3 is a top plan view of the control so mechanism of Figure 2 withthe cap removed.

Figure 4 is a. view in central vertical longitudinal section taken onthe line 44, Figure 2, looking in the direction of the arrows.

Figure 5 is an enlarged detail plan view of dash pot intake trap, withneedle valve cap removed.

Figure 1 of the drawings shows an embodiment of this improvedelectrically-operated and controlled oil burner mechanism as installedin connection with a domestic heater or furnace of any desired type. Theoil burner is illustrated in side elevation and comprises an electricmotor 1 mounted within the casin resting andsecuredupon the support 2having adjustable legs 3, the motor shgft- 4 extending to the right ofthe motor casing through a fan blower housing 5 to an oil pump 6. A fanblower, not shown, is mounted upon the motor shaft within the 1 housingand the fanblower housing opens into a draft pipe 7 which extends alongone slde of the burner mechanism and enters the combustion chamber '8 ofthe commercial heater or furnace 9. The motor shaft is exended to theleft to pass through an atomiz- 1ng pump housing 10 and metering pumphousing 11 and is adapted to operate simul taneously the oil pump 6, thefan blower .with?n the housing 5, the atomizing pump within the housing10, and the metering e0 pump within the housing 11.

Oil, or other desirable liquid fuel, is drawn from a tank, not shown,through the pipe 12 by the oil pump 6 from which it is delivered by theway of pipe 13 to an oil'strainer housing 14 having an overflow pipe 15by which excess oil isreturned to the tank.

The oil strainer housing is shown in end elevation and in' section inFigures 2. and'4, respectively. The oil supply pipe 13 is shown inFigure 2 as entering the upper lefthand side of the housing and theoverflow pipe 15 is shown leaving the upper right hand side of thehousing.

Figure 4 shows an oil strainer in the form of a fine wire mesh cylinder16 carried upon a centrally perforated plate-17 held seated upon ashoulder within the housing below the opening of the supply pipe 13. Thebottom of the housing is provided with an outlet orifice 18'opening intoan oil valve chamber 19, whereby it is seen that all oil entering theoilvalve chamber 'must first ass through the cylindrical strainer 16 and iexcess oil is supplied to the oil strainer housing it will pass outtherefrom through the overflow pipe 15 back to the tank.

The oil valve and oil valve chamber 19 are arranged within a housing 20which also forms a partof the metering pump housing 11 and the oil valvechamber 19 is provided with a passage 21 leading from the upper portionthereof to the upper portion of the interior of the metering pumphousing 11. The oil valve chamber supports an oil valve 22 normally heldseated in its uppermost position by a spring 23 and is caused to openupon the depression of a rod 24 mounted thereabove in the housing 20. Asshown in Figure 4, the rod 24 is provided with a 'bel- 100 lows stuflingbox 25 attached at its upper end to a plate 26 over the well 27, inwhich the rod operates, by a cap 28 which also acts as a bearing orguide for the upper end of the rod. When the rod is depressed by thefuel pressure, as hereinafter described, it depresses the oil valve 22allowing the oil fiowing from the oil strainer housing through theconduit 18 and valve chamber 19 to enter conduit 21 and be dischargedwithin the metering pump housing 11 As shown in Figure 1, this oil valveand metering pump housing 20 is secured to the atomizing pump housingand the atomizing pump housing is secured in turn to the end bell 29 ofthe motor casing 1 by means oftie rods 30.

The metering pump comprises a cylindrical base 31 which-is held in placebetween the metering ump housing 11 and the atomizing pump ousing 10 bythe said tie rods 30.

The metering pump housing provides a cy-- lindrical chamber 32 which isconcentric with the extension 4 of the motor shaft 4, which shaft passesthrough the center of the metering pump base 31 and is operativelyattached to a rotor 33 adapted to rotate freely within the chamber 32and bear on one side against a, projection of similar size and shape 34extending toward the center of the chamber from the fixed base 31. The

oil or liquid fuel entering from conduit 21 into the metering pumpchamber 32 is delivered at a constant rate of supply to the interior ofthe atomizin pump housing 10 irrespective of the quality of the fuel.The atomizing pump housing 10 is a cylindrical casing abutting the fixedmetering pump base 31 and end bell 29 of the motor .casing 1, whichcylindrical casing is arranged eccentric to the motor shaft 4, and a clindrical rotor 35 is axially mounted upon t e motor shaft 4 to closelyapproach the interior walls of the atomizing chamber within the housing10 at the lower side thereof, and said rotor is provided with aplurality of blades 36 slidably mounted within uides in the rotor 35withtheir outer ends a apted to contact with and wipe over the entireinner surface of the atomizing pump cylinder as the-rotor rotates.

The end bell 29 is secured to the motor casing l in fixed relation byany desired means. As heretofore stated the tierods 30 secure theoilvalve and metering pump housa duct in the end bell which is also incom- 'munication with a discharge pipe 41 to convey the atomized mixtureof oil and air under pressure from the atomizingpump through the draftpipe 7 to the burner nozzle 42, as shown in Figure 1. Pressure is alsoconveyed by a pipe 39 from' the atomizing pump to the under side of adash pot bellows housing 40.

The dash pot bellows housing is in the form of a cylindrical casing openat the top and is formed integral with the cap 28 secured upon the oilvalve and metering pump housing 20 over the well 27. A metallic bellows43 closed at the bottom andsecured to an outwardly extending plate 44 isarranged within this housing with the plate 44 clamped about the upperedges of the housing by a closure 45 havin a central opening with adepending cy lrical hearing 46, which closure also acts as a-base orsupport for the control mechanism. A plunger 47 having an enlarged headin the lower end thereof is mounted in the central bearing 46 with thelower enlarged head resting upon the bottom of the bellows 43. andnormally held in contact therewith bya compression spring 48 arrangedabout the plunger and bearing between the underside of the closure andupper side of the enlarged head. A stufling box comprising a metallicbellows 49 is arranged about said lunger 47 and bearing 46, whichbellows is closed at the lpwer end and is interposed between the outerbellows 43 and undersideof the enlarged head of .the plunger47 with theopposite end secured to an outstanding plate held in airtight positionto the underside of the closure 45 by clamping member 50- It is,therefore, readily seen that when pressure created by the atomizing pumpis conducted therefrom through pipe 39 to the underside of the bellows43, the bellows 43 will. be caused to contract, thereby imparting anupward movement to the plunger 47. The n ward movement of the plunger 47is emp oyd to operate the oil valve lunger 24 and also the ignitionswitch, as hereinafter described, and it is desirable to impart a slowupward movement to said plunger 47 and allow it to have a quick returnto its lowermost position. When the bellows 43 is caused to contract,the air contained between the inner walls of this bellows 43 and theouter walls of the bellows 49 must be allowed to escape to theatmosphere and by regulating the rate of escapement the upward movementof the plunger 47 can also be regulated. To this end a chamber 51 isprovided integral with andextending above 1,aaa,oeo

the upper side of the closure 45 which chamwith themovable end of thebellows, and

her is referabl provided with a depressed conica bottom aving a smallduct 52 leading from the apex thereof to the atmosphere and also avertical duct 53 leadin from the sloping surface thereof as shown inFigure 5 to the interior of the dash pot bellows housing between thebellows. 43 and 49, as

shown in Figure 4. A cap 54 is secured above the chamber 51, as shown inFigure 4, which cap contains a central vertical (passage 55 h'avin aright angularly exten ing duct 56 exten ing therefrom and leading to theatmosphere with a bearing surface formed about the passageway 55 belowthe lower juncture of said duct, and a needle valve 57 is mounted in thecap 54 adapted to adjustably control the size of the opening between thepassage 55 and duct 56. A check valve, preferably in the form ot a ball58, is provided upon the bottom of the chamber 51 which normally closesthe duct 52. By the proper adjustment of the needle.

valve 57, the time required to contract the bellows 43 from its positionresting upon the bottom of the housing 40 until the enlarged head of theplunger 47 engages the bottom of the bearing 46 can be accurately timedand when the pressure about the exterior of the bellows 43 is relieved,the spring 48 will expand it causing a suction through duct 53 tochamber 51 allowing lthe atmospheric pressure entering duct 52 to passabout the check valve 58 and, by this construction,an adjustable dashpotis provided controlling the time of movement of the plunger 47.

As heretofore said, the oil valve 22 is normally closed and is opened bya downward movement of the rod 24. The upward movement of the plunger 47actuated by the bellows 43 is imparted to alever 59 pivotally mounted at60 in line with the upper extrem ity of the rod 24, which lever 59extends beyond its pivot andis provided with a downwardly extendingadjustable contact 61 adapted to engage a ball 62 supported in the upperend of the rod 24 whereby upward. movement of the plunger 47 causes ,ade-.

pression. of the rod 24 to o n'the oil valve 22 and when ressure wi Wthe houslng 40 is relieved, t e de ression of the plunger 47 by thespring 48 a owe the upward tens: on of the spring 23 to return the rod24 and lever 59 therewith.

from the ressure s1 What I claim is:

1. In a fluid umping apparatus, a fluid "Pu p, a norm a closed housing,

regulated means to allow the escape of air from theinterior of thebellows. upon compres'sion' to time the opening of the fluid intakevalve.

2. In a fluid pumping apparatus, a fluid pump, a normally closed fluidintake valve,

a closed housing, a bellows having one end closed by the housingclosure, a connection from the pressure side of the pump to the interiorof the housing, and means actuated by the compression of. the bellows toopen the fluid intake valve including a plunger I -means for normallyexpanding the bellows to close the fluid intake valve upon cessationofpump pressure, and means admitting air to the interior of theexpanding bellows independent of said regulating air escape WALTER w.WILLIAMS.

means.

